CONTENTS. 



SEEIES B. VOL. XCII1. 



No. B 649.— January 2, 1922. 



FAGS 



Address of the President, Prof. C. S. Sherrington, at the Anniversary Meeting, 



November 30, 1921 1 



On the Optical Rotatory Power of Crystalline Ovalbumin and Serum Albumin, 

 By Elrid Gordon Young, Ramsay Memorial Fellow. Communicated by Prof. 

 F. G. Hopkins, F.R.S 15 



Experiments on Amphibian Metamorphosis and Pigment Responses in Relation 

 to Internal Secretions. By Julian S. Huxley (New College, Oxford), and 

 Lancelot T. Hogben (Imperial College of Science, London). Communicated 

 by Prof. E. W. MacBride, F.P..S 36 



Studies in Bacterial Variability. — -On the Occurrence and Development of Dys- 

 agglutinable, Eu-agglutinablc and Hyper-agglutinable Forms of Certain 

 Bacteria. (A Report to the Medical Research Council.) By E. W. Ainley 

 Walker. Communicated by Prof. Georges Dreyer, F.R.S 54 



No. B 650.— February 1, 1922. 



The Titration Curve of Gelatine. — Report to the Medical Research Council. By 

 D. J. Lloyd, Biochemical Laboratory, Cambridge, and C. Mayes, Physical 

 Laboratory, Eton College. Communicated by Prof. F. G. Hopkins, F.R.S. ... 69 



The Hemolytic Action of Sodium Glycocholate. By Eric Ponder. Communicated 



by Sir E. Sharpey Schafer, F.R.S 86 



The Mechanism of Ciliary Movement. By J. Gray, M.A., Fellow of King's 

 College, Cambridge, and Balfour Student, Cambridge University. Com- 

 municated by Prof. J. S. Gardiner, F.R.S 104 



The Mechanism of Ciliary Movement. II.— The Effect of Ions on the Cell 

 Membrane. By J. Gray, M.A., Fellow of King's College, Cambridge, and 

 Balfour Student in the University of Cambridge. Communicated by Prof. 

 J. S. Gardiner, F.R.S 122 



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